diff --git a/modules/fmc_24vio/const/fmc_24vio_impl.xdc b/modules/fmc_24vio/const/fmc_24vio_impl.xdc
index e3421ccbf..f8270b9bc 100644
--- a/modules/fmc_24vio/const/fmc_24vio_impl.xdc
+++ b/modules/fmc_24vio/const/fmc_24vio_impl.xdc
@@ -15,3 +15,16 @@
 # -------------------------------------------------------------------
 set_property PULLTYPE PULLDOWN [get_ports FMC_LA_P[*]]
 set_property PULLTYPE PULLDOWN [get_ports FMC_LA_N[*]]
+
+##set_property IO_BUFFER_TYPE none [get_ports FMC_DP0_C2M_P]
+##set_property IO_BUFFER_TYPE none [get_ports FMC_DP0_C2M_N]
+
+set_clock_groups -asynchronous -group [get_clocks \ 
+{softblocks_inst/FMC_24V_IN_inst/fmcgtx_exdes_i/fmcgtx_support_i/fmcgtx_init_i/U0/fmcgtx_i/gt0_fmcgtx_i/gtxe2_i/TXOUTCLK}]
+
+# -------------------------------------------------------------------
+# FMC MGTs - Bank 112
+# -------------------------------------------------------------------
+set_property LOC $FMC_GTX_LOC \
+[get_cells softblocks_inst/FMC_24V_IN_inst/fmcgtx_exdes_i/fmcgtx_support_i/fmcgtx_init_i/U0/fmcgtx_i/gt0_fmcgtx_i/gtxe2_i]
+
diff --git a/modules/fmc_24vio/fmc_24v_in.block.ini b/modules/fmc_24vio/fmc_24v_in.block.ini
index e695e8249..f29024929 100644
--- a/modules/fmc_24vio/fmc_24v_in.block.ini
+++ b/modules/fmc_24vio/fmc_24v_in.block.ini
@@ -3,6 +3,8 @@ description: FMC 24V IO Module Input
 entity: fmc_24v_in
 type: fmc
 constraints: const/fmc_24vio_impl.xdc
+otherconst: mgt_pins
+ip: fmcgtx
 
 [IN_VTSEL]
 type: param enum
diff --git a/modules/fmc_24vio/hdl/fmc_24v_in_wrapper.vhd b/modules/fmc_24vio/hdl/fmc_24v_in_wrapper.vhd
index 6bb932f60..ddc478308 100644
--- a/modules/fmc_24vio/hdl/fmc_24v_in_wrapper.vhd
+++ b/modules/fmc_24vio/hdl/fmc_24v_in_wrapper.vhd
@@ -67,7 +67,11 @@ signal IN_VTSEL         : std_logic_vector(31 downto 0);
 
 
 signal fmc_in           : std_logic_vector(7 downto 0);
-signal fmc_out          : std_logic_vector(7 downto 0);
+
+
+--attribute io_buffer_type : string;
+--attribute io_buffer_type of FMC_o.TXP_OUT, FMC_o.TXN_OUT, FMC_i.RXP_IN, FMC_i.RXN_IN: signal is "none";
+
 
 begin
 
@@ -108,6 +112,22 @@ port map (
 --    IB          => FMC_i.FMC_CLK1_M2C_N
 --);
 
+---------------------------------------------------------------------------
+-- GTX Loopback Test
+---------------------------------------------------------------------------
+fmcgtx_exdes_i : entity work.fmcgtx_exdes
+port map (
+    Q0_CLK1_GTREFCLK_PAD_IN     => FMC_i.GTREFCLK,
+    GTREFCLK                    => open,
+    drpclk_in_i                 => clk_i,
+    SOFT_RESET                  => '0',
+    TRACK_DATA_OUT              => open,
+    ERROR_COUNT                 => open,
+    RXN_IN                      => FMC_i.RXN_IN,
+    RXP_IN                      => FMC_i.RXP_IN,
+    TXN_OUT                     => FMC_o.TXN_OUT,
+    TXP_OUT                     => FMC_o.TXP_OUT
+);
 
 ---------------------------------------------------------------------------
 -- FMC CSR Interface
diff --git a/modules/fmc_24vio/hdl/fmc_24v_out_wrapper.vhd b/modules/fmc_24vio/hdl/fmc_24v_out_wrapper.vhd
index 4d2ca7a37..1c7e6374b 100644
--- a/modules/fmc_24vio/hdl/fmc_24v_out_wrapper.vhd
+++ b/modules/fmc_24vio/hdl/fmc_24v_out_wrapper.vhd
@@ -61,7 +61,6 @@ signal OUT_EN           : std_logic_vector(31 downto 0);
 signal OUT_CONFIG       : std_logic_vector(31 downto 0);
 signal OUT_STATUS       : std_logic_vector(31 downto 0);
 
-signal fmc_in           : std_logic_vector(7 downto 0);
 signal fmc_out          : std_logic_vector(7 downto 0);
 
 begin
diff --git a/modules/fmc_24vio/hdl/fmc_loopback b/modules/fmc_24vio/hdl/fmc_loopback
new file mode 120000
index 000000000..d5bdf8330
--- /dev/null
+++ b/modules/fmc_24vio/hdl/fmc_loopback
@@ -0,0 +1 @@
+../../fmc_loopback/hdl/
\ No newline at end of file
diff --git a/targets/PandABox/Makefile b/targets/PandABox/Makefile
index 5e639e895..59f9bc825 100644
--- a/targets/PandABox/Makefile
+++ b/targets/PandABox/Makefile
@@ -44,18 +44,20 @@ VERSION :
 
 $(IP_CORES) :
 	$(RUNVIVADO) -mode batch -source $(TARGET_DIR)/scripts/build_ips.tcl \
-	    -tclargs $(TARGET_DIR) -tclargs $(IP_DIR) -log build_ips.log -nojournal
+	  -log build_ips.log -nojournal \
+	  -tclargs $(TARGET_DIR) -tclargs $(IP_DIR)
 
 $(PS_CORE) :
 	$(RUNVIVADO) -mode batch -source $(TARGET_DIR)/scripts/build_ps.tcl \
-	    -tclargs $(TARGET_DIR) -tclargs $(BUILD_DIR) -log build_ps.log -nojournal
+	  -log build_ps.log -nojournal \
+	  -tclargs $(TARGET_DIR) -tclargs $(BUILD_DIR)
 
 panda_top.bit : VERSION $(IP_CORES) $(PS_CORE)
 	$(RUNVIVADO) -mode batch -source $(TARGET_DIR)/scripts/build_top.tcl \
-        -log build_top.log -nojournal \
-	    -tclargs $(TOP) \
-	    -tclargs $(TARGET_DIR) \
-	    -tclargs $(BUILD_DIR) \
-	    -tclargs $(AUTOGEN) \
-	    -tclargs $(IP_DIR)
+	  -log build_top.log -nojournal \
+	  -tclargs $(TOP) \
+	  -tclargs $(TARGET_DIR) \
+	  -tclargs $(BUILD_DIR) \
+	  -tclargs $(AUTOGEN) \
+	  -tclargs $(IP_DIR)
 
diff --git a/targets/PandABox/hdl/panda_carrier_top.vhd b/targets/PandABox/hdl/panda_carrier_top.vhd
index 90add525e..e6f38408e 100644
--- a/targets/PandABox/hdl/panda_carrier_top.vhd
+++ b/targets/PandABox/hdl/panda_carrier_top.vhd
@@ -243,6 +243,7 @@ signal FMC_MAC_ADDR_ARR     : std32_array(2*NUM_FMC-1 downto 0);
 -- FMC Block
 signal FMC_i  : FMC_input_interface;
 signal FMC_o  : FMC_output_interface;
+--signal FMC_o  : FMC_output_interface := ( TXN_OUT => 'Z', TXP_OUT => 'Z');
 signal FMC_io : FMC_inout_interface;
 
 -- SFP Block